bosom friends

bosom friend

1. One's close or closest friend; a friend one holds dear to one's heart. We grew up right next door to each other, so we have been bosom friends since we were kids.
2. slang Lice. Ugh, I'm so itchy—I really hope my bosom friends aren't back.
See also: bosom, friend
Farlex Dictionary of Idioms.

bosom friends

verb
See bosom chums
See also: bosom, friend
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • bosom friend
  • buddy
  • bosom buddy
  • pal
  • bosom pal
  • chum
  • bosom chum
  • bosom chums
  • bizatch
  • biznitch
References in classic literature
He seemed to take to me quite as naturally and unbiddenly as I to him; and when our smoke was over, he pressed his forehead against mine, clasped me round the waist, and said that henceforth we were married; meaning, in his country's phrase, that we were bosom friends; he would gladly die for me, if need should be.
They ceased to be master and servant, in order to become bosom friends.
It may seem remarkable, that, of four persons whom we have commemorated at Mr Allworthy's house, three of them should fix their inclinations on a lady who was never greatly celebrated for her beauty, and who was, moreover, now a little descended into the vale of years; but in reality bosom friends, and intimate acquaintance, have a kind of natural propensity to particular females at the house of a friend--viz., to his grandmother, mother, sister, daughter, aunt, niece, or cousin, when they are rich; and to his wife, sister, daughter, niece, cousin, mistress, or servant-maid, if they should be handsome.
Tom had likewise been propitiated, by being allowed to bring his three bosom friends, who went by the school-boy names of Rumple, Sherry, and Spider.
Then the warriors rested a space and patted their stomachs, and smiled across at each other like bosom friends; for a man when he as dined looks out pleasantly upon the world.
She had twelve intimate and bosom friends out of the twenty-four young ladies.
We made these strangers our bosom friends, our confidential servants; we borrowed their artists and their arts, and despised the honest simplicity and hardihood with which our brave ancestors supported themselves, and we became enervated by Norman arts long ere we fell under Norman arms.
"Marilla," she demanded presently, "do you think that I shall ever have a bosom friend in Avonlea?"
"Still, dear, you must be very lonely, and feel the need of a bosom friend."
He is the confidential adviser and bosom friend of every young lady in the house.
Miss Landless has become your bosom friend. You care for her peace of mind?'
No second man on earth has such a bosom friend. And now, my poor Rosina, Heaven grant me wisdom to discharge my errand aright!
Curiously enough, "The Old Male," as he is now affectionately called, became from this moment quite a bosom friend. Nothing would satisfy us but that we should all lodge at the same pension together, and there many a day we fought our battles over again.
The foremost and most energetic in instituting this search was the bosom friend of Mr.
Tom was General of one of these armies, Joe Harper (a bosom friend) General of the other.